The purpose of this study was to investigate if perceptual learning is generalizable to different severities of dysarthria secondary to amyotrophic lateral sclerosis (ALS). Five individuals with dysarthria secondary to ALS participated as speakers (two mild dysarthric speakers, two severe dysarthric speakers, and one control speaker who was classified with mild dysarthria). Thirty listeners engaged in a pretest, familiarization (training), and posttest design. The pretest and posttest were identical in structure and stimuli; however, during the familiarization portion listeners were randomly assigned to one of two training conditions, mild or severe. During the training portion listeners additionally received feedback on their responses. Results concluded that perceptual adaptation differed depending on the training condition. Perceptual adaptation was not demonstrated when listeners received the severe training condition as there was a decrease in intelligibility from pretest to posttest. However, there was generalization in the listeners who received the mild training condition as there was an increase in intelligibility from pretest to posttest.